A Study on Mold Powder for High Aluminium Austenite Non-Magnetic Steel 20Mn23Al2V Slab Casting

张宇斌; 文光华; 于雄; 唐萍

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A Study on Mold Powder for High Aluminium Austenite Non-Magnetic Steel 20Mn23Al2V Slab Casting

更新时间：2026-01-21

- A Study on Mold Powder for High Aluminium Austenite Non-Magnetic Steel 20Mn23Al2V Slab Casting
- Special Steel Vol. 34, Issue 6, Pages: 22-25(2013)
- 作者机构：
  
  1. 山西太钢不锈钢股份有限公司技术中心,太原,030003
  2. 重庆大学材料科学与工程学院,重庆,400044
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：07 June 2013，
  
  Online First：06 September 2022，
  
  Published：06 September 2013
- 稿件说明：
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张宇斌, 文光华, 于雄, et al. A Study on Mold Powder for High Aluminium Austenite Non-Magnetic Steel 20Mn23Al2V Slab Casting[J]. Special Steel, 2013, 34(6): 22-25.
DOI：

张宇斌, 文光华, 于雄, et al. A Study on Mold Powder for High Aluminium Austenite Non-Magnetic Steel 20Mn23Al2V Slab Casting[J]. Special Steel, 2013, 34(6): 22-25. DOI：

摘要

浇铸过程无磁钢20Mn23A12V(/%:0.14~0.20C、≤0.50Si、21.5~25.0 Mn、1.50~2.50Al、0.04~0.10V)中的Al-[Al

]

易与保护渣中的SiO

-(SiO

)反应

导致结晶器保护渣变性

要求低碱度、低Al

的保护渣;并且该钢合金元素含量高

液相线温度低

要求低熔化温度的保护渣。设计了3种低碱度(0.55~0.61)、低熔化温度(904~1 015℃)的结晶器保护渣(/%:20.2~24.4CaO、35.3~40.0SiO

、2.2~4.1Al

、3.0~5.0B

)

经25 t中间包

200 mm×1 260 mm板坯连铸试验。结果表明

5.0%B

碱度0.50~0.60、熔化温度1 010℃、粘度0.215Pa·s的无磁钢20Mn23Al2V保护渣在0.60~0.65 m/min拉速下能较好的满足连铸工艺要求。

Abstract

The Al in non-magnetic steel 20Mn23Al2V (/% ： 0. 14 ~ 0. 20C

≤0. 50Si

21. 5 ~ 25. 0Mn

1. 50 ~ 2. 50Al

0. 04 ~0. 10V)- [Al

]

easily reacts with SiO2 in mold powder- (SiO

) led to modification of mold powder and the liquidus temperature of non-magnetic steel is lower because of higher alloy elements content

therefore the mold powder with low basicity

low A12O3 content and low melting temperature is required. Three kinds of mold powder (/% ： 20. 2 ~ 24.4CaO

35. 3 ~40.0SiO

2. 2 ~ 4. 1 Al

3. 0 ~5. 0B

) with low basicity (0. 55 ~0. 61) and low melting temperature (904 ~ 1 015

℃

) have been designed. The test results by 200 mm x 1 260 mm slab casting with 25 t tundish show that the mold powder for non-magnetic steel 20Mn23Al2V with 5.0% B

basicity 0.50 ~0. 60

melting temperature 1 010 °C and viscosity 0. 215 Pa·s and in casting speed 0. 60 ~ 0. 65 in/min is optimum to satisfy the requirement of casting process.

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